Improvement in drag-bar for cultivators



C. ALVORD.

Drag Bar for Cultivators.

Patented Oct. 20, 1868.

Y IWT/vesss j /zv VEN 7-01? the location ofthe cultivator-tooth.

Jewelcase- @gtatwt i CLARK ALVORlF COURTLAND, WISCONSIN.

Letters Patent No. 83,235, dated October 20, 1868.

IIVROVEMENT IN DRAG-BAR FOR CULTI'V'ATORS.

To all whom. itmay concern Be it known that I, CLARK ALvoRD,.of the townof Courtland, in the county 'of Columbia, and State of Wisconsin,- haveinvented a new and improved Drag- Bar for Cultivators; also, an improvedmode of constructing the cultivator-tooth, and attaching it to the saidbar; andIdo hereby decla're that the following is a full and exactdescription thereof, reference being had to the accompanying drawings,and to the letters of reference marked thereon, making part of thisspeciication.

, The nature of my invention consists in making the drag-bar of anindependent-acting cultivator'of two pieces of timber, arranged,compounded, and put together as shown in the annexed drawings,andconstructing and attaching the cultivator-tooth to the same,I asshown in the same drawings.

To enable others skilled inthe art to make and use my invention, I willproceed to describe its construction andoperation.

I construct the 'lower part of the drag-bar of hard wood, three inchessquare, and about three feet long;

cut a slot in the end, as shown at A, g. l, to receive the tooth, asshown in position in igs. 2 and 3.

Upon the top of this bar, I bolt another timber, covering the entire topof the other, including the slot; this timber being of the same width ofthe drag-bar, and from one andone-fouith to one and three-fourths of aninch thick. This should be good timber; white oak or white ash willanswer well. The bolt should be at the front end, or the end oppositeand furthest from Over andincluding both timbers, I place a metallicclasp, iitting closely, but not' so close but what it can be moved fromend to end', for the purpose of varying the stiiiness of the spring orupper piece of timber, and keeping it in place. This clasp is shown atA, iig. 2.

The cultivator-tooth is constructed of one piece, bent as shown at A,iig. 3, and welded at the lower end, upon which the shovel or point iswelded. The bolt that holds the tooth to the drag-bar passes through thebar and the front angle of the tooth, as shown at A, iig. 3, upon whichthe tooth is allowedv to swing, being arrested in its backward movementby coming in contact with'the top timber of the drag-bar, by which it issupported. l p

In the annexed drawings- Figures 1 and 3 are sectional views, and

Figure 2 a perspective vlew of the bar and tooth combined, and with theclasp as it appears in operation.

The object of the arrangement is to allow the tooth to yield when itcomes in contact with an unyielding substance,

By moving the clasp forward, the elasticity of the top timber isincreased; by moving it back, the elasticity is diminished, and may bealmost or quite destroyed.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The compound dragfbar, as above described andv shown.

2. rlhe construction ofthe cultivator-tooth, and fastening it to thecb'ag-bar by passing the bolt through the angle, as above described andshown.

3. The movable clasp, in combination with the dragbar, as abovedescribed and shown, and for the purposes above set forth.

CLARK ALVORI).

Witnesses:

ANDREW J. ALvonn, I. A. TowNsENn.

